RefrigiWear Heated Insoles | Multicolor | Ragg Wool. RefrigiWear 16 Packs of 2 per caseFull-foot insole warmerUp to 9 hours of heat The full-foot insole warmers adheres to bottom of sock and provides up to 9 hours of heat. There are 16 pairs per case. Full-foot insole warmer Up to 9 hours of heat Adheres to bottom of sock 16 Packs of 2 per case RefrigiWear Heated Insoles | Multicolor | Ragg Wool... - RefrigiWear Heated Insoles | Multicolor | Ragg Wool. |