This backpack's in-built air-conditioner prevents you from getting a sweaty back - Yanko Design
EOD 10 Bomb Suit Active Cooling System - Med-Eng
19° North | 19°North Hawaii Climate Adaptive Cooling Gear for Extreme Environments
Circulating Cold Water cooling vest, Stop the Heat Before The Heat Stops You
VITL - First Active Cooling Modular Commuter Backpack by Kenny Tai — Kickstarter
Amazon.com : FE Active Waterproof Cooler Backpack - 35L Ice Soft Cooler Dry Backpack, Insulated Cooler Bag. Great Beach Bag, Fishing Bag & Ice Chest. Compact for Camping & Backpacking | Designed
FE Active - 35L Waterproof Dry Bag with EVA Insulation, BPA-Free Cool Bag, FDA Approved for Kangzeit Cooling, Camping, Beach, Hiking, Trekking, Backpacking, Designed in California : Amazon.de: Sports & Outdoors
VITL Backpacks: The Signature Cooling Bag – V.I.T.L. Backpacks