--- product_id: 38503114 title: "Rocky Thermal Underwear for Kids, Boys Thermals, Long Johns Underwear, Base Layer for Cold Weather/Skiing" brand: "rocky" price: "$38.08" currency: USD in_stock: true category: "Rocky" url: https://www.desertcart.us/products/38503114-rocky-thermal-underwear-for-kids-boys-thermals-long-johns-underwear store_origin: US region: United States of America --- # Durable poly-spandex blend resists wear & tear Ultra-soft fleece lining for cozy warmth Stay-put design fits snugly under heavy layers Rocky Thermal Underwear for Kids, Boys Thermals, Long Johns Underwear, Base Layer for Cold Weather/Skiing **Brand:** rocky **Price:** $38.08 **Availability:** ✅ In Stock ## Summary > ❄️ Stay warm, stay unstoppable — Rocky thermals for the winter warriors! ## Quick Answers - **What is this?** Rocky Thermal Underwear for Kids, Boys Thermals, Long Johns Underwear, Base Layer for Cold Weather/Skiing by rocky - **How much does it cost?** $38.08 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/38503114-rocky-thermal-underwear-for-kids-boys-thermals-long-johns-underwear) ## Best For - rocky enthusiasts ## Why This Product - Trusted rocky brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** Tough poly-spandex fabric withstands countless washes - • **All-Day Toasty Comfort:** Lightweight fleece lining keeps kids warm without bulk - • **Moisture-Wicking Power:** Keeps skin dry and comfortable during active winter days - • **No More Itch, Just Snug:** Soft, non-itchy material kids actually love to wear - • **Stay-Put Fit Under Layers:** Designed to stay in place beneath jackets and cargo pants ## Overview Rocky Thermal Underwear for Kids offers a premium base layer crafted from a durable 90% polyester and 10% spandex blend, featuring ultra-soft fleece lining and a stay-put design. Engineered for cold weather and skiing, these thermals provide moisture-wicking warmth and all-day comfort, making them the #1 choice in boys' thermal underwear sets with over 5,400 glowing reviews. ## Description Buy Rocky Thermal Underwear Kids, Boys Thermal Underwear Set Long Johns Thermals Kids Base Layer kid thermals top bottom set Boys Winter Clothes Shirt & Pants, Ski/Extreme Cold (Black, Large) and other Sets at desertcart.com. Our wide selection is elegible for free shipping and free returns. ## Features - THERMAL UNDERWEAR KIDS: STAY-PUT DESIGN: Oversized jackets? Check. Bulky sweaters? Double check. Cargo pants loaded with all the essentials? Yup, even them. No matter how heavy your outer layers are, our thermals for kids base layers for cold weather stay put under even the heaviest loads. - KEEP WARM AND DRY: Ultra soft fleece lined thermals for kids combined with moisture-wicking power can only mean one thing: Your little one is wearing Rocky fleece lined base layer kids underwear. No more sweaty, shivering nights — just warm, toasty goodness that wraps you in whole body comfort. - ALL-DAY COMFORT: From morning jogs in freezing temps to chilly winter nights, our underoos are designed to keep you comfortable and warm all day long. With our fleece base layer kids soft fabric that’s lightweight yet warm, it’s the kids underwear boys love. - EASY TO CLEAN: A few wash cycles, and your long johns are toast. At least, inferior waffle-knit thermal tights are. Not with Rocky winter undies! Our thermal wear for boys are made from durable poly-spandex and superior stitching, washing machines are no match for their tough-as-nails construction. - THERMALS KIDS LOVE: “Mooooom! They’re SO itchy!” Four words you’ll never hear your little one utter in a pair of Rocky thermal wear for kids boys underwear. With fleecy-soft comfort and a no-ride design, your little one will be nothing but cozy and content with Rocky kids thermal wear. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01M12L67P | | ASIN | B0859L35SR | | Age Range Description | Little Kid | | Apparel Closure Type | Pull On | | Apparel Fabric Stretch | Medium Stretch | | Apparel Fabric Weight Class | Medium Weight | | Best Sellers Rank | #42,753 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #1 in Boys' Thermal Underwear Sets | | Brand Name | Rocky | | Collection Name | Rocky | | Color | Black | | Customer Reviews | 4.5 4.5 out of 5 stars (5,435) | | Date First Available | March 5, 2020 | | Department | boys | | Fabric Type | 90% Polyester, 10% Spandex | | Fit Type | Regular | | Fit to Size Sentiment | fits as expected | | Manufacturer | Rocky | | Manufacturer Part Number | LYSB01M12L67P-SPRTSEQIP | | Material Type | Polyester Blend | | Neck Style | Crew Neck | | Number of Items | 1 | | Occasion Type | Everyday | | Package Quantity | 1 | | Pattern | Solid | | Product Care Instructions | Machine Wash | | Size | Large | | Sleeve Length Description | Long Sleeve | | Sleeve Type | Long Sleeve | | Style Name | Snug | | Style Number | 85BKL | | UPC | 789900659432 | | Unit Count | 1 Count | ## Images ![Rocky Thermal Underwear for Kids, Boys Thermals, Long Johns Underwear, Base Layer for Cold Weather/Skiing - Image 1](https://m.media-amazon.com/images/I/51v0YUCHFoL.jpg) ![Rocky Thermal Underwear for Kids, Boys Thermals, Long Johns Underwear, Base Layer for Cold Weather/Skiing - Image 2](https://m.media-amazon.com/images/I/71Adhqx3CDL.jpg) ![Rocky Thermal Underwear for Kids, Boys Thermals, Long Johns Underwear, Base Layer for Cold Weather/Skiing - Image 3](https://m.media-amazon.com/images/I/91GPZWquasL.jpg) ![Rocky Thermal Underwear for Kids, Boys Thermals, Long Johns Underwear, Base Layer for Cold Weather/Skiing - Image 4](https://m.media-amazon.com/images/I/81lFHKWZHWL.jpg) ![Rocky Thermal Underwear for Kids, Boys Thermals, Long Johns Underwear, Base Layer for Cold Weather/Skiing - Image 5](https://m.media-amazon.com/images/I/814lhvO9YIL.jpg) ## Available Options This product comes in different **Color, Size, Special Size Type** options. ## Questions & Answers **Q: What is size chart for 14 yr old 120 lbs 5'3"** A: Go with the XL for sure. **Q: Existe alguna talla que sirva para mi hijo de 2 años?** A: Ellos tienen las tallas exactas como indica la tabla de medidas. Corren grande **Q: Is the shirt and leggings both fleece lined?** A: Yes both are lined! very soft and my grandson loves them! **Q: Are these thermals moisture wicking?** A: I'm not sure, all I know is my kids love them for skiing. ## Frequently Bought Together - Rocky Thermal Underwear for Kids, Boys Thermals Top & Bottom Set, Long Johns Underwear, Base Layer for Cold Weather/Skiing - Thermajohn Thermal Underwear Set for Boys | Kids Base Layers for Skiing | Long Johns - Rocky Thermal Underwear for Kids, Girls Thermals Top and Bottom Set, Long Johns Underwear, Base Layer for Cold weather/skiing --- ## 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/38503114-rocky-thermal-underwear-for-kids-boys-thermals-long-johns-underwear](https://www.desertcart.us/products/38503114-rocky-thermal-underwear-for-kids-boys-thermals-long-johns-underwear) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-08-05*