we have use halo sleepsack for we son for a long time now . I be always a little weary of these early walker sleepsack as I like the idea of he foot be cover and cozy . however , once we move to a warmer climate my son be too warm in he normal fleece halo sleepsack . I figure the early walker sleepsack would be great because it would be kinda like have a blanket on and stick you foot out to stay comfortable temperature wise . so I buy two of these and love they ! my son be 15 month and tall - 32 inch - and these fit he great . he wear the size large\/12 -18 month with some room to grow . it do drag on the ground a bit , but not to the point of trip he up . love these ! I wish they make they in a cotton version also .