Will the side mesh pocket hold a 32oz (3.5 in diameter) water bottle?

No. I managed to barely fit a 2.7 inch diameter, 24 oz steel water bottle. I had to buy a new one- I had a 3 inch, 32 oz, and it was barely too big.

Will it work for school books ? Will it hold ?

Maybe 1 book. Other than that, no. It's made very well, just not big enough to handle what a normal size back pack could.

Is it water resistant?

I'd say water repellent, I used a water can on it and the water beaded up, I've never had any issue while walking in the rain , my contents were always dry. I hope this helps.

If I put unfolded 8.5 x 11 paper in a folder or envelope, is the top wide enough to hold without crimping or folding the top corners of the papers?

If you put it in a STURDY folder - yes. The folder would alter the shape of the pack a little bit - but it's doable. The backpack is not square - so it's not really meant to hold a folder or standard composition notebook. I have a hard plastic folder I sometimes carry that protects the paper fine.If you put loose paper or a flimsy folder (like a normal manilla filing folder) it will fold over on itself or crimp the edges.The largest "square" object you can put in here, without altering the shape of the backpack, is a macbook. I usually travel with a one-subject notebook, macbook 12" and my iPad Pro in the large compartment, then my phone, wallet, pens/pencils and other oddities in the other compartments. I don't mind my notebook "curving" a bit in transport - looseleaf paper will not survive. If I need to carry loose papers I bring them in my plastic folder, then the notebook doesn't curve. The backpack looks a little funky - but only if someone stares at it long enough.

Outdoormaster Sling Bag Hiking Daypack Crossbody Shoulder Chest Urban Outdoor

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$75.65

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Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎒 Carry Confidence, Wherever You Go!

SECURE YOUR ESSENTIALS - Hidden anti-theft pocket and multiple compartments guard your valuables on the go.
SMART STORAGE SOLUTIONS - Dedicated tablet sleeve fits up to 12.6", plus external water bottle holder and glasses pocket.
TAILORED COMFORT FOR ALL - Reversible padded strap fits lefties and righties, adjustable for chest, shoulder, or crossbody wear.
EFFORTLESS URBAN MOBILITY - Lightweight yet durable nylon keeps you agile without sacrificing toughness.
VERSATILE ADVENTURE READY - Breathable back panel and compact design make it perfect for city commutes or weekend hikes.

The OutdoorMaster Sling Bag is a lightweight, durable 12L daypack designed for versatile urban and outdoor use. Featuring a reversible padded shoulder strap for ambidextrous comfort, multiple secure pockets including a hidden anti-theft compartment, and space for a 12.6" tablet, it blends practical storage with sleek, breathable design. Ideal for professionals and adventurers seeking a compact yet spacious crossbody backpack.

Specifications

ASIN	B015OFQIS8
Age Range Description	Adult
Apparel Closure Type	Zipper
Apparel Fabric Stretch	No Stretch
Apparel Fabric Weight Class	Lightweight
Backpack Design	Daypack Backpack
Backpack Harness Size	One Size Fits All
Backpack Harness Type	Shoulder Harness
Best Sellers Rank	#43,868 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #171 in Hiking Daypacks
Brand Name	OutdoorMaster
Color	Gray
Compatible Device Size Maximum	12 Inches
Customer Reviews	4.5 out of 5 stars 12,172 Reviews
Embellishment Feature	Plush Accent
Fabric Type	Nylon
Fit Type	Regular
Fit to Size Sentiment	Neutral
Item Dimensions D x W x H	3.94"D x 11.8"W x 17.7"H
Item Shape	Rectangular
Item Type Name	Sling bag
Item Weight	15.2 Ounces
Lining Description	Nylon
Manufacturer	OutdoorMaster
Manufacturer Part Number	600180
Material Type	Nylon
Model Name	800179
Number Of Pockets	3
Number of Compartments	5
Number of Items	1
Other Special Features of the Product	Adjustable
Outer Material	Nylon
Pattern	Solid
Pocket Description	Utility Pocket
Product Care Instructions	Dry Clean Only
Product Style	Sling Backpacks
Recommended Uses For Product	Sport
School Type	High School
Shell Type	Soft Shell
Shoulder to Bottom Hem Length	17.7 Inches
Size	12L
Sleeve Length Description	Sleeveless
Sport Type	Hiking
Storage Volume	12 Liters
Strap Type	Cross-Body
Style Number	hiking-daypacks
Subject Character	Sports
Theme	Sports
UPC	759803000648
Unit Count	1 Count
Water Resistance Level	Not Water Resistant

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