Columbia Boys Kestrel Trail convertible pant. Size XXS - 4/5 Button and zipper closure with adjustable waistband. Lightweight nylon pants that zip off into shorts are perfect for outdoor summer adventures. Omnishade to protect you from the sun and Omniwick to keep you dry. My kids are super sensitive to grass and these pants save our summer. No more itchy legs after playing outside or hiking! They never complained about being hot. Unfortunately for us, growth spurts hit before we got to wear these.