Best Square Rectangular Sleeping Bags of 2025

The Apex 250 Sleeping Bag is designed for your comfort during spring and summer hiking and camping. With an extreme rating of -0°C, it provides a survival option for unexpected cold nights. However, you'll find it most comfortable between 6°C to 10°C, making it ideal for warm nights and indoor use. The hollow fibre insulation ensures you stay cosy and snug, while the left-hand zip is conveniently positioned for right-handed users, making it easy to get in and out.

The Summit Mini Sleeping Bag from Mountain Warehouse is designed for outdoor enthusiasts looking for a lightweight option. With an extreme rating suitable for temperatures as low as -10°C, it ensures you stay warm during survival situations. Its 2/3 season capability makes it ideal for cooler nights in spring and autumn, perfect for festivals and backpacking trips. The envelope shape provides ample space for a comfortable night’s sleep, while the drawcord hood helps retain body heat, ensuring you're snug and warm.

The Vango Atlas 350 is a warm and comfortable sleeping bag designed for three seasons, accommodating temperatures from 0° to 20°C. Its Polair Hex Shell provides durability with breathable polyester, while the soft Polair lining ensures easy maintenance. With Thermolock Insulation, you’ll stay warm and avoid cold spots, thanks to the S-Stitching that keeps fibres evenly distributed. Additionally, the two-way zip allows for convenient ventilation, perfect for warmer nights when you need to cool down.

The Snugpak Navigator is a versatile sleeping bag with a comfort rating of -2°C, making it ideal for chilly nights. Its lightweight and compact design allows for easy transport, weighing only 1750g and packing down to a manageable size. The square shape not only offers extra room but can also be fully opened and used as a quilt, providing flexibility for various outdoor situations. Made from high-performance fabrics, it ensures durability, warmth, and comfort during your adventures.

The Snugpak Sleeper Kids Sleeping Bag is a lightweight and compact option, weighing just 1000g and packing down to a manageable size. Its square shape allows you to use it as both a sleeping bag and a blanket, offering versatility for various sleeping situations. Made with high-performance fabrics, it ensures durability and comfort, keeping you warm during chilly nights. Additionally, you can open it fully to use it as a quilt, providing further flexibility for your camping or sleepover needs.

The Snugpak Jungle Bag offers a comfortable sleeping experience with a temperature rating of 7°C, making it ideal for warmer nights. Weighing only 900g and packing down to a compact size, it is perfect for travellers seeking lightweight gear. Its unique square shape allows you to use it as a blanket, providing versatility during your adventures. Constructed with high-performance fabrics, the Jungle Bag ensures durability and warmth, making it a reliable choice for outdoor enthusiasts.

The Vango Evolve Sleeping Bag offers a spacious design, perfect for a comfortable night's sleep whether you're camping or on an adventure. Built for all seasons, it ensures you stay warm in various temperatures, making it a versatile choice. The high-quality materials, including durable polyester fabric and insulation, guarantee long-lasting performance. Plus, its compressible design means you can easily transport it, storing it compactly without hassle. This sleeping bag is ideal for those who value comfort and convenience during their outdoor escapades.