Thermarest Boost 650 20F/-6C Sleeping Bag

Thermarest Boost 650 20F/-6C Sleeping Bag

  • From £249.95
  • (FREE Delivery to Certain Areas)
  • RRP £290.00
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Item in Stock   |   Usually dispatched within 24 hours
Delivery Options Available
Standard 3-5 Working Days Available
Estimated delivery date: Tue 13th October - Thu 15th October
Express 1-2 Working Days Available
Estimated delivery date: Tue 13th October - Wed 14th October
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  • From £249.95
  • (FREE Delivery to Certain Areas)
  • RRP £290.00

Comfort isn’t one-size-fits-all, which is why the Boost 650 lets you customize its shape to achieve the perfect balance of space and warmth. Designed as a spacious semi-rectangular sleeping bag, it provides ample room for side sleeping, shifting positions, spreading out, and fully relaxing. Unlike a traditional mummy bag, the semi-rectangular shape offers significantly more internal space, allowing unrestricted movement for a comfortable night’s sleep.

However, more space requires more body heat to stay warm, and that’s where WarmZip comes in. By zipping up the WarmZip center zipper, the Boost 650 transforms from a roomy semi-rectangular bag into a thermally efficient mummy bag. This feature pulls the 650-fill down closer to your body, minimizing excess space and enhancing warmth. WarmZip can increase the bag’s temperature rating by up to 10°F (6°C), ensuring extra comfort on colder nights.

Additionally, the Boost 650 includes signature Therm-a-Rest features like a plush draft collar, a draft tube along the entry zipper, and a cinchable hood—rounding out a sleep experience designed for ultimate comfort.

Thermarest designed the Boost 650 to be comfortable when you’re falling asleep, when you’re asleep and when you’re wide awake and hanging out in your tent. The arm holes give you easy access to the WarmZip without having to use the side zipper. They also allow you to access your belongings, read a book, play cards or high-five your friends without leaving the cozy warmth of your sleeping bag. Getting too warm? Use the arm holes to ventilate or comfortably sleep with just your arms out. You can also ventilate around your torso or down by your feet with the two-way side zipper. Every zipper line on the Boost has a durable YKK anti-snag pull to eliminate annoying snags and damaging tears.

All that comfort must be bulky and heavy, right? Think again. The Boost 650 was built to backpack we dialed in the materials and design to make it light, packable and high-performing in variable backcountry conditions. Zoned Insulation places the 650-fill hydrophobic down in key warmth-retention areas (on top, around your core and shoulders) and reduces it where it’s less efficient (on the bottom), allowing the Boost to create more warmth with less down. The shell and liner are made of 100%-recycled nylon that was handpicked for its light weight and super-soft feel. The PFAS-free DWR coating and the hydrophobic down keep the Boost warm and comfy even in wet weather.

  • Fill material 650 Fill Duck PFAS Free Hydrophobic Down, 
  • Shell fabric 20D 100% Recycled Nylon Rip Stop 
  • Lining fabric 20D 100% Recycled Nylon Rip Stop
  • Zipper side Left

Temprature

  • Comfort: 0c
  • Limit: -6c
  • Extreme: -23c

Specifications:

Short:

  • Weight: 1.02kg
  • Length: 188cm
  • Pack Size: 24x17cm

Regular

  • Weight: 1.21kg
  • Length: 203cm
  • Pack Size: 32x19cm

Long

  • Weight: 1.4kg
  • Length: 216cm
  • Pack Size: 33x19cm

 

Sleeping Bag Specifications
14201-60012914 Weight (kg) 1.02 Kg
14201-60012914 Pack Size (cm) 24x17 cm
14201-60012914 Comfort Rating 0 °C
14201-60012914 Limit Rating -6 °C
14201-60012914 Extreme Rating -23 °C
14203-60012912 Weight (kg) 1.21 Kg
14203-60012912 Pack Size (cm) 32x19 cm
14203-60012912 Comfort Rating 0 °C
14203-60012912 Limit Rating -6 °C
14203-60012912 Extreme Rating -23 °C
14205-60012910 Weight (kg) 1.4 Kg
14205-60012910 Pack Size (cm) 33x19 cm
14205-60012910 Comfort Rating 0 °C
14205-60012910 Limit Rating -6 °C
14205-60012910 Extreme Rating -23 °C
Contact us with any questions you have about this product

UK Postage

To provide the best possible service we use different courier services depending on the item Size, Weight and service selected. The Couriers we use are Royal Mail, Amazon Shipping, DPD & FedEx.
Most deliveries are made per working day [Monday to Friday] and exclude bank holidays, If you feel you will not be in to receive your parcel, please take advantage of using a different delivery address where someone can take delivery. All our couriers have pick up locations and can be selected once you have the tracking number and the courier has the parcel.

Deliveries are made between 8am till 9pm unless a specific option is chosen.

All Express delivery orders must be placed no later than 11am to be posted the same day [Monday to Friday]. Orders placed after this day may be posted the following working day

England, Wales & Southern Scotland
Order Value Up to £74.99
Low value & Large Letter Size - 2-5 Working Day*  - £2.50
Standard Parcel - 2-5 Working Day - £4.00
Express Delivery 1-2 Working Day - £8.00
Before 1PM - 1-2 Working Day - £10.00

Order Value Above £75.00

Standard Parcel - 2-5 Working Day - Free
Express Delivery 1-2 Working Day - £6.00
Before 1PM - 1-2 Working Day - £10.00

  • Certain oversized items, or items with an excessive length or diameter, carry a £20 surcharge. This is added during checkout and indicated in the product description.

North Scotland,Scottish Islands, Isle Of Wight

Order Value Up to £74.99 & Under 1.99kg
Low value & Large Letter Size - 2-5 Working Day*  - £2.50
Standard Parcel - 2-5 Working Day - £4.00
Express Delivery - 1-2 Working Day - £8.00

Order Value Above £75.00 & Under 1.99kg
Standard Parcel - 2-5 Working Day - Free
Express Delivery - 1-2 Working Day - £6.00

Order Value Below £74.99 & Weight 2-4.99kg*
Standard Parcel - 2-5 Working Day - £4.00

Order Value Above £75.00 & Weight 2-4.99kg*
Standard Parcel - 2-5 Working Day - Free


Weight 5kg to 15kg - 2-7 Working Day - Flat £20.00 Charge

*This delivery service is restricted depending on Size & Weight of the parcel. If your order is of an excessive size we may have to cancel the order

Channel Islands, Isle of Man, Northern Ireland,

Order Value Up to £74.99 & Under 4.99kg
Low value & Large Letter Size - 2-5 Working Day*  - £2.50
Standard Parcel - 2-5 Working Day - £4.00
Express Delivery - 1-2 Working Day - £8.00* - Under 1.99Kg only

Order Value Above £75.00 & Under 4.99kg
Standard Parcel - 2-5 Working Day - Free
Express Delivery - 1-2 Working Day - £6.00

Weight 2.00 to 2.75kg - 2-7 Working Day - Flat £10.00 Charge
Weight 2.76 to 15kg - 2-7 Working Day - Flat £25.00 Charge

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Can I return an item?

We can accept goods back for exchange or refund or Credit, The goods need to be of re-saleable quality and all labels and relevant paperwork are present. We will not accept any item back that has been worn, or not in a re-saleable condition i.e animal hair's, odors from smoke or fragrances, or any sign that goods have been used other than inspecting indoors.

As it’s the buyer’s responsibility to post goods back, we highly recommend using a courier with the correct insurance and proof of delivery back to us. We cannot be held liable for items lost in post.

Before sending your item back please make sure of the following

  • The item is still in a new and unused condition, free of odours and pet hairs
  • All labels and swing tags are still attached to the garment, and any boxed items are kept in the original box.
  • Any items which are blister packed are still in the condition in which they are sent.
  • Tents and canopies have not been erected and still in their original box.
  • If your order included a promotional item (such as a free gift or multi-buy offer), all items must be returned in full to qualify for a complete refund; otherwise, the value of any retained items will be deducted from your refund.

Full Returns Information can be found here

Outdoor Action Accept the following methods of Payment

  • All Major Credit Cards [excluding American Express]
  • Paypal
  • Paypal 0% Finance or Split Payment - More info

All payments are made via a super-secure webpage & following GDPR procedures

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