--- product_id: 23527053 title: "RK3 Military Rubber Fin with Adjustable Stainless Steel Spring Straps" brand: "apeks" price: "$544.23" currency: USD in_stock: true reviews_count: 11 category: "Apeks" url: https://www.desertcart.us/products/23527053-rk3-military-rubber-fin-with-adjustable-stainless-steel-spring-straps store_origin: US region: United States of America --- # Short wide blade for max thrust & maneuverability Ultra-rugged rubber build Adjustable stainless steel spring straps RK3 Military Rubber Fin with Adjustable Stainless Steel Spring Straps **Brand:** apeks **Price:** $544.23 **Availability:** ✅ In Stock ## Summary > 🦈 Dive like a pro, move like a legend. ## Quick Answers - **What is this?** RK3 Military Rubber Fin with Adjustable Stainless Steel Spring Straps by apeks - **How much does it cost?** $544.23 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/23527053-rk3-military-rubber-fin-with-adjustable-stainless-steel-spring-straps) ## Best For - apeks enthusiasts ## Why This Product - Trusted apeks brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trusted by Pros:** Standard issue for military, special ops, and public safety divers worldwide. - • **Maximum Propulsion:** Wide blade delivers superior forward thrust for chasing big underwater moments. - • **Effortless On & Off:** Spring straps designed for quick adjustments—even with gloves on. - • **Compact Travel Ready:** Shorter blade fits easily in carry-ons without sacrificing power. - • **Military-Grade Durability:** Built tough for harsh environments and decades of elite use. ## Overview The Apeks RK3 Military Rubber Fin combines rugged thermoplastic rubber construction with adjustable stainless steel spring straps, offering unmatched durability and ease of use. Designed in collaboration with the US military, its short wide blade maximizes propulsion and maneuverability, making it a top choice for professional and recreational divers who demand reliability and performance in any environment. ## Description Designed in collaboration with the US military and renowned for outstanding performance and reliability, the Apeks RK3 is a rugged thermoplastic rubber fin featuring an over-sized foot pocket to accommodate dry suit boots and a spring strap for easy donning and doffing. The RK3 is available in three sizes of medium, large and super. Apeks didn't give the RK3 fin a shoe size range as this can be very misleading. The environment that an RK3 is used in will tend to dictate the size of fin that you need, for example do you dive in a warm environment wearing wetsuit boots, or are you walking across pebbled beaches and wearing a dry suit and rigid dry boots? Both forms of footwear may be a size 9, but will take up different amounts of space in the fin foot pocket. Therefore, Apeks recommend that you visit your local dive store and try the fins on with your own footwear, just to ensure that you're getting the right fit for your style of diving.Based on one of the first vented rubber fins sold in North America and popular among military and professional divers. Compact, and ultra-rugged for use in harsh environments. Improved foot pocket with spring straps for ease of use with cold hands or thick gloves. The design has been the standard gear issue fin for military, special ops, coast guard and public safety divers for decades. Short wide blade provides maximum forward thrust while maintaining great maneuverability. Vented blade design reduces resistance on the upstroke and en Review: Strong good fins - These fins are awesome, they're a little bit on the stiffer side and on the shorter side. This makes them great for traveling as you can just barely fit them into a backpack that can still pass as a personal item on a plane. The heel is very fast and easy to get on because of the spring clip. That being said these are definitely better to wear with booties as opposed to Barefoot. Propulsion and maneuverability are quite good with them as well, I really enjoyed them this far Review: They would be better if they had Bluetooth - I got these fins to replace my Cressi spits that I had for years and finally started cracking. The Apeks are very nice, Just a tad shorter but wider so I can fit them on my roll on bag. Performance is great. Better than the Cressis and I was just down in mexico with them for a week and was kicking like a madman doing some large wildlife photography. Not only could I keep up with the big fish (well as much as a human can) but they were very comfortable and no sore spots, blisters or anything. I also really like the spring straps and it's easy peasy. And there are little holes where you can take them off and clip them to your BC which is huge when you are exiting the water with a large camera in rough seas. ## Features - Based on one of the first vented rubber fins sold in North America and popular among military and professional divers. - Compact, and ultra-rugged for use in harsh environments. - Improved foot pocket with spring straps for ease of use with cold hands or thick gloves. - The design has been the standard gear issue fin for military, special ops, coast guard and public safety divers for decades. - Short wide blade provides maximum forward thrust while maintaining great maneuverability. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00TY5PQ8I | | Age Range Description | Adult | | Best Sellers Rank | #68,203 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #35 in Diving Fins | | Brand Name | Apeks | | Closure Type | Buckle | | Color | Black | | Customer Reviews | 4.7 4.7 out of 5 stars (312) | | Fit Type | Regular | | Item Weight | 5 Pounds | | Manufacturer | Apeks | | Manufacturer Part Number | 621160-621205 | | Material Type | Rubber | | Model Number | 621160-621205 | | Sport Type | Scuba Diving | | UPC | 053242305259 707565261005 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** Apeks - **Color:** Black - **Fit Type:** Regular - **Material:** Rubber - **Sport:** Scuba Diving ## Images ![RK3 Military Rubber Fin with Adjustable Stainless Steel Spring Straps - Image 1](https://m.media-amazon.com/images/I/51pVb2Ny0vL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Questions & Answers **Q: I’m looking for professional grade fun that’s also travel friendly. Would these fit into a traditional carry on size bag?** A: They will easily fit into a duffle bag and should be able to fit into a hard carry on case, these fins are amazing easy to get on and off, very powerful I love them **Q: Please provide the size chart for this fins?** A: I don't believe there is a size chart, but with a 11-1/2" foot, along with the boot, I use a large and it fits perfect. The strap is a coil-like strap that stretches well, but does not become loose. Overall, these fins are great, I hope you find your answer and pick-up a pair. **Q: I wear size 9 or 9.5 and i have narrow feet. Would a large or a small fit better?** A: Thanks for the question. You are right in the middle of sizes. The Medium is 7-9 and the Large is 9-11. If your foot is narrow, you might be able to fit a Medium, but depending on the boot a Large might be better. Please let us know if we can help any further. Cody HouseofScuba **Q: My question may be very silly. The publication price is for the pair of fins? Thank you very much.** A: The price is for a pair of fins ## Customer Reviews ### ⭐⭐⭐⭐⭐ Strong good fins *by R***K on October 25, 2024* These fins are awesome, they're a little bit on the stiffer side and on the shorter side. This makes them great for traveling as you can just barely fit them into a backpack that can still pass as a personal item on a plane. The heel is very fast and easy to get on because of the spring clip. That being said these are definitely better to wear with booties as opposed to Barefoot. Propulsion and maneuverability are quite good with them as well, I really enjoyed them this far ### ⭐⭐⭐⭐⭐ They would be better if they had Bluetooth *by E***A on July 22, 2019* I got these fins to replace my Cressi spits that I had for years and finally started cracking. The Apeks are very nice, Just a tad shorter but wider so I can fit them on my roll on bag. Performance is great. Better than the Cressis and I was just down in mexico with them for a week and was kicking like a madman doing some large wildlife photography. Not only could I keep up with the big fish (well as much as a human can) but they were very comfortable and no sore spots, blisters or anything. I also really like the spring straps and it's easy peasy. And there are little holes where you can take them off and clip them to your BC which is huge when you are exiting the water with a large camera in rough seas. ### ⭐⭐⭐⭐⭐ Top Shelf Dive Fins *by K***M on August 5, 2024* Extremely robust, kick up minimal debris, comfortable, slip on and off easy and stay put nicely while diving. Foot well seems wide at first but that's what makes them go on and off easy and you don't notice it while diving. Part of the design. I'm a size 10 with standard width dive boots. No issues with the standard size. Best fins I've owned. Military grade. ## Frequently Bought Together - Apeks RK3 Military Rubber Fin with Adjustable Stainless Steel Spring Straps - Cressi Adult Diving Dry Snorkel with Splash Guard and Top Valve - Supernova Dry: Designed in Italy - Adult Unisex Crew Water Boots for Scuba Diving, Surfing, Canyoning, 5 mm Neoprene Thickness - Isla: designed in Italy --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/23527053-rk3-military-rubber-fin-with-adjustable-stainless-steel-spring-straps](https://www.desertcart.us/products/23527053-rk3-military-rubber-fin-with-adjustable-stainless-steel-spring-straps) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-21*