Merino Wool's amazing properties means that this sleeping bag will help to keep your baby warm in winter and cool in summer.  We really recommend this product as it is such a wonderful all rounder.  Whilst the initial outlay in terms of price is higher than normal sleepbags, the savings you make by buying only onesize outweighs this. The Bambino Merino Wool sleeping bag is an award winning product that we know you will love.  Remember that it is more convenient to have two sleeping bags, one on and one in the wash!