Merrell temperature ratings are general guidelines for warmth and comfort. How you feel temperature depends on a variety of factors. At different activity levels individuals will experience different metabolic rates which can be influenced by many other variables such as weather conditions, exposure time, clothing and cold sensitivity. Give a warm hug of comfort to your little one's feet wearing the Merrell Kids Snow Crush 3.0 Waterproof boots. Synthetic upper for durability. Recycled PET linings. 400g insulation on footbed. Lace-up closure. Round toe design. Non-marking man-made outsole with added traction for better stability. Imported. Measurements: Weight: 10 oz Product measurements were taken using size 3 Little Kid, width M. Please note that measurements may vary by size. Weight of footwear is based on a single item, not a pair.