This is the same construction as used in the manufacture of white-water rafting gear

it comfortably carries gear and keeps it dry

This dry bag is constructed with 840D nylon tarpaulin TPU (thermoplastic polyurethane)–the same type of material often used for inflatable boats because it’s highly-resistant to punctures and abrasion

Can fit on thick belts up to 2”-wide

filson man waffle knit thermal crew fmtee0012k0016 108 ICONS_FLSXWP_SHIRTS This is the same constructionThe Waffle Knit Thermal Crew traps a layer of air between the fabric and your skin for enhanced breathability and insulation. Heavyweight Peruvian cotton has a soft feel thats comfortable to wear under a shirt or jacket. Rib knit cuffs stay in place for easy layering.