Arm sleeves in bulk (3 or 4 pairs) for Kids without thumb holes protect your kids from the sunburn and play. Cooling protofilament: 90% Acrylic, 10% spandex. Two main functions: Sunblock and Protection How to choose the size? - Age 1-3 choose Size M                                              Age 4-7 choose Size L Practical Pure Color: Black, White, Blue, Pink UV Arm Sleeves (Sun Sleeves, Cooling Sleeves) Specification:  - Availability of multiple color combinations: 3 Pairs Black/ 3 Pairs White/ 3 Pairs(Black+White+Blue)/ 3 Pairs(Black+White+Pink)/ 4 Pairs(Black+White+Blue+Pink)  - Size: Medium/ Large - Unisex, Boys, Girls  - Texture: Soft, Comfortable, not hot  - Includes: 3 or 4 individual packed Arm sleeves  - Perfect for All Outdoors: Great skin protection when they are playing, cycling, football, basketball, tennis and so on.  - Washing Instructions:  1. Dissolve neutral detergent in 30℃ water  2. Soak for 15 minutes in the detergent  3. Wash by hand gently, do not wring vigorously  4. Avoid washing with mixed colors clothing, line dry in the shade