Nivolltha 3.5 TOG Sleep Sack with Detachable Sleeves & Feet – 100% Cotton, Bear Pattern, Size S

Cozy warmth for extra-chilly nights

Meet the Nivolltha 3.5 TOG Sleep Sack with Feet, a toddler wearable blanket designed for cool rooms. The outer fabric is soft 100% organic cotton, while a plush quilted polyester fill adds a gentle loft against the skin. The bear pattern brings a touch of whimsy to bedtime, making nightly routines feel a little cozier. This design is protected by UK Patent No. 6409262 and EU Patent No. 015083699-0001, underscoring its carefully crafted construction for cooler conditions.

Adjust warmth as you go

The long sleeves are detachable via an integrated zip system. Keep sleeves on for full warmth on chilly nights, or remove them to adapt to warmer rooms or growing mobility. This versatility makes it suitable for deep winter or transitional seasons, while maintaining a snug profile that still feels roomy enough for movement.

Move freely, sleep soundly

Designed with active sleepers in mind, this sleep sack features a built-in footed design that preserves warmth without restricting crawling, walking, or kicking. The roomy leg area supports natural hip movement, helping little ones stay comfortable while exploring their world.

Smart details for modern bedtime

• Bottom crotch snaps enable quick diaper changes at night without fully dressing or undressing.
• 2-way zipper simplifies dressing and nighttime diaper adjustments.
• Zipper guard protects delicate skin from rubbing and irritation.
• Shaped neckline and snug cuffs help keep warmth in, whether sleeves are worn or not.

Size guidance and care

Four sizes are available to fit growing toddlers: XS, S, M, and L, with length guidance to help you choose the best fit. Refer to the size chart for precise measurements to ensure comfort and freedom of movement. Easy-care materials make laundry days simpler, so bedtime routines stay smooth.

Why parents choose Nivolltha

This sleep sack blends warmth, breathability, and practicality in a single design. The 3.5 TOG rating targets cool sleeping environments, while the 100% cotton exterior and plush interior offer a soft, breathable feel that’s gentle on delicate skin. The combination of patent-backed reliability and thoughtful details helps create a balanced bedtime experience that feels reassuring without promising outcomes. Bear-patterned style adds a friendly touch to the nightly ritual, making it a familiar bedtime companion for toddlers.