Specifications: The color of the shorts changes with the change of temperature. Below 30 celsius degrees are orange/blue/purple, and above 30 celsius degrees will become yellow/green/blue. The surface is smooth. When it close to the skin, there is no friction and irritation. Tighter mixed fabric is for a higher level of sun protection. Color changing shorts is very cool and stylish, and it's suitable for travel, beach, lounge wear, daily wear, etc. Type: Shorts Size Type: Regular Gender: Boys Material: Nylon, Polyester, Spandex Style: Casual Garment Care: Hand Wash Features: Drawstring, Changing Color, Lattice, Elastic Size Details: [Our Size S] Waist: 43cm-50cm/16.9"-19.7", Hip: 72cm/28.3", Length: 26cm/10.2" (Approx.) [Our Size M] Waist: 47cm-54cm/18.5"-21.3", Hip: 76cm/29.9", Length: 28cm/11" (Approx.) [Our Size L] Waist: 51cm-58cm/20.1"-22.8", Hip: 81cm/31.9", Length: 30cm/11.8" (Approx.) [Our Size XL] Waist: 55cm-62cm/21.7"-24.4", Hip: 84cm/33.1", Length: 32cm/12.6" (Approx.) [Our Size 2XL] Waist: 59cm-66cm/23.2"-26", Hip: 88cm/34.6", Length: 34cm/13.4" (Approx.) [Our Size 3XL] Waist: 63cm-70cm/24.8"-27.6", Hip: 92cm/36.2", Length: 36cm/14.2" (Approx.) Notes: Please refer to our size chart and choose the right size. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Package Includes: 1 x Shorts