WORLD-BIO Disposable Insole Foot Warmers 20 Pairs Value Pack, Provide 8 Plus Hour Heating, Long Lasting Safe Natural Odorless Air Activated Warmer for Toe foot Body, Hot Foot Warmers for men, women, kids

roughly US women's sizes 5.5 through 9.5, and US men's sizes 4.5 through 7.5

EASY TO STORE - Individually sealed package for easy travel. Easily stored in a backpack, luggage, or jacket pocket. Ideal for all outdoor activities, whether sports, walking or in the stadium.

EXTRA THIN & NO CLUMPING - Heated Insoles for the whole feet. No Clumping. Feet warmers with extra big heating area for extensive warmth.

SAFE & NATURAL - 100% Natural Ingredients, Non Toxic and Odorless. Air activated feet warmers, warmer heats up in 5-10 minutes