Why Black? Black says 'performance'. Our black arm sleeves have proved very popular on the skate park, soccer field and basketball court. The light compression gives them a sporty feel, the colour coordinates with many different looks and colours, and delivers the ultimate in UV protection. Product Details Premium Italian fabric Made from recycled yarn* Soft feel ARPANSA tested UPF 50+ (blocks over 98% over UVA and UVB rays) Light-weight (140gsm) Breathable Quick drying Two-way stretch for perfect fit 90% Recycled Polyamide (Econyl®); 10% elastane (Lycra®) Gentle elastic band at top to hold in place Side seam, incorporating woven Crazy Arms® label Made in Australia * The fabric is made from ECONYL®, a regenerated nylon coming from ghost fishing nets recovered from the ocean, and other nylon waste. Size Guide Crazy Arms® sizing is based on the height of your child. Simply measure their height and this will tell you which size to order. Small: Kids between 115-135cm high (45-53") Ages 5-8 Medium: Kids between 135-150cm high (53-59") Ages 8-11 Large / Adult Small: Kids between 150-160cm high (59-63”) Ages 12-14 (approx.) More details on sizing can be found here