These mittens are easy to get on because they fully open up. They are Obermeyer Kids' Thumbs Up Mitten see the details from website below. These are xs and I would guess the perfect age range 3-5, best to measure...see picture. We got two pair and this one was a bit small as my guys is already 6. They have only been worn a couple time. Even the velcro still looks new. We designed the Thumbs Up Mitten with your family in mind: Featuring a hook-and-loop tab closure, little ones can easily remove this mitten all on their own. A snug, ribbed cuff keeps the Thumbs Up Mitten in place underneath their jacket, while HydroBlock® Classic 10k/10k waterproof/breathable fabric means that the Thumbs Up Mitten keeps your kids dry, even on the slushiest winter days. Integrated clips and an integrated nose wipe add everyday functionality, for a mitten that parents and kids alike will love.