Which size should I choose

its thickness or its appearance

Wider fit designed for kids' feet

We have checked the waterproofness of this product in use in various weather conditions over several days and we have also carried out laboratory tests

Kids’ waterproof hiking jacket - MH500 TW - Purple Size:14-15years/5'2"-5'4" Which size should I chooseA waterproof jacket for your children, perfect for keeping your little adventurer dry and turning an hour of hiking in the rain into a truly magical experience. A jacket that breathes, whats the purpose of this? Thermal Evaporative Resistance (RET) indicates how the fabric allows body moisture to escape. The lower it is, the better! At RET=12, the jacket effectively wicks away perspiration. Scale: <6 = extremely breathable, <12 = highly breathable,