Tog: 2.5 Size: Newborn 2-in-1 Swaddle & Sleep Sack: converts from a secure arms-in swaddle with snaps to transition to an arms-out sleep sack as your baby grows, ensuring continued comfort and security. TOG-Rated for Optimal Warmth: TOG-rated for safe sleep, this swaddle sack is ideal for room temperatures between 60-65°F / 15-18°C, eliminating the need for extra blankets and reducing sleep hazards. Bell-Shaped Bottom: Features a bell-shaped bottom that allows for healthy leg and hip movement and growth, ensuring your baby remains comfortable and supported. Easy & Safe Diaper Changes: Equipped with a two-way zipper for quick and hassle-free overnight diaper changes with minimal disruptions, and a zip enclosure that protects your baby's delicate skin from irritation. Super Stretchy & Snug Fit: Made from stretchy organic cotton firm enough to restrict the startle reflux while still allowing freedom of movement and self-settling, providing a cozy and safe sleep environment.