Purflo
Baby Sleep Bag, 2.5 Tog
7/10 overall£40.00
A sleep bag with a wide, tapered base designed to keep a baby in a safe back-sleeping position and prevent them sliding down.
Purflo's sleep bag is built around a specifically shaped base — wider at the top, tapering towards the feet — designed to encourage a baby to stay in the safe, flat, back-sleeping position recommended by NHS Safe Sleep guidance, rather than sliding down inside the bag overnight. It's a more deliberate shape than a straightforward rectangular sleep bag, aimed squarely at reinforcing the sleep position parents are advised to use.
Versus Tommee Tippee's Grobag, both are respected TOG-rated options at a similar 2.5 Tog weight for cooler months; the difference is mainly this shaped-base detail, which is worth prioritising if you've found your baby tends to wriggle down inside a standard rectangular bag.
What we liked
- Tapered base shape helps keep baby in the recommended back-sleeping position
- Breathable, TOG-rated fabric for safer temperature regulation
- Sized ranges cover a good stretch of months per bag
Where it falls short
- Pricier than more basic sleep bags of a similar TOG rating
- Shaped base is a smaller refinement, not a dramatic difference for every baby
- Fewer print/colour options than some mainstream brands
Specs
- Fabric
- Breathable cotton
- Sizing
- 0-6 months, 6-18 months, 18-36 months
- Base shape
- Tapered, designed to prevent sliding down
- TOG rating
- 2.5 Tog
How we scored it
Self-Soothe / Arms Freedom
Whether the design lets baby get a hand to their face to self-settle, versus fully restricting arm movement.
Not swaddle-specific, but the secure fit supports settled sleep.
Safety & Hip-Healthy Fit
Room for natural hip and leg movement and overall adherence to safe-sleep guidance.
Roomy leg space and a base shape aimed at supporting the recommended safe sleep position.
Value & Longevity
How many months of use you realistically get before baby outgrows or rolls out of it.
Good multi-month sizing brackets, at a moderate price premium.
Weighted by importance for this category — see our editorial policy for how we test.
The alternative
Tommee Tippee
The Original Grobag Baby Sleep Bag, 2.5 Tog
A cotton-rich sleep bag with a hip-healthy, roomy fit that removes the need for loose blankets in the cot.