
How to choose the right size
User size: Measure your total height, barefoot, in an upright position.
Choosing the length: For optimal thermal efficiency, choose the most suitable length possible while maintaining a slight space at the feet.
🛌 Sleeping bags – Length
| Bag size | User height (cm) | Internal length of the bag (cm) |
|---|---|---|
| Shorts | up to 168 | 180 |
| Regular | up to 183 | 198 |
| Long | up to 198 | 213 |
👤 Big Agnes sleeping bag cuts
| Cut | Description | Benefits | Recommended use |
|---|---|---|---|
| Unisex/Men | Standard mummy cut, balanced width at the shoulders and hips | Good compromise between warmth, comfort, and weight. | Trekking, mountaineering, hiking |
| Women | Shorter cut, narrower shoulders, wider hips | Optimized insulation, better fit for women | Hiking, trekking, camping in cool weather |
| Wide | Mummy enlarged at the shoulders and hips | Increased comfort, freedom of movement | Wide sleepers, comfortable use |
| Rectangular | Straight cut with full zip | Maximum comfort, modularity | Camping, van life |
| Quilt/System | Without back insulation, compatible with Big Agnes mattress | Reduced weight, thermal efficiency | Ultralight, bikepacking |
📐 Internal widths (indicative depending on the range)
| Cut | Shoulders (cm) | Hips (cm) | Feet (cm) |
|---|---|---|---|
| Standard Mummy | 150 – 155 | 135 – 140 | 100 – 105 |
| Wide | 160 – 165 | 145 – 150 | 105 – 110 |
| Women | 145 – 150 | 140 – 145 | 100 – 105 |
Dimensions may vary slightly depending on the Big Agnes model (down or synthetic). The sizes indicated correspond to the brand's general recommendations for choosing the length and cut.
- Shipping costs : Shipping costs may vary depending on the weight, dimensions of the package, and the delivery address. These costs will be calculated and displayed at checkout.
- Free shipping : We offer free shipping on all orders of $150 or more, before taxes and after discounts.
- Oversized products : A delivery charge may apply even if the minimum order for free delivery is not met. This applies to oversized products (weight or volume).
Warehouse pickup
You can pick up your order directly from our warehouse to save on delivery costs.
Ready within 4 hours, depending on the pickup schedule at our warehouse at 7250 Clark Street in Montreal.
- Monday: 10:00 to 16:30
- Tuesday: 10:00 to 16:30
- Thursday: 10:00 to 16:30
Return policies
All sales are final. No exchanges or refunds will be accepted, even if the color, size, or product does not meet your expectations. We encourage you to carefully review your selection before completing your purchase.
If the product you purchased has a manufacturing defect or is faulty, we want to resolve it quickly. Please email us at info@marchealpin.caPlease include a description of the problem and photos of the product in question. Our team will be happy to assist you and find a suitable solution.
Thank you for your understanding of our policy, which allows us to maintain such competitive prices!
Description
Description
The Big Agnes Lost Dog 15F/-9°C Long Left Sleeping Bag is a high-performance synthetic sleeping bag designed to provide warmth, comfort, and durability in cold weather. Its FireLine™ ECO insulation, made from 100% recycled fibers, maintains its thermal properties even in wet conditions. Its spacious fit and mattress attachment system ensure a stable and comfortable sleep all night long.
Benefits
• High-performance synthetic insulation that stays warm even when damp
• Mattress attachment system to prevent nighttime slipping
• Roomy cut providing comfort and freedom of movement
• Durable and easy-to-maintain materials
• Compressible and lightweight bag for easy transport
Features
Features
Payment and security
Payment method
Your payment information is processed securely. We do not store your credit card details and do not have access to your payment information.
Latest products purchased
Alpine Market is
Zero stores, only deals
Alpine Market, it's a online store Specializing in outdoor gear. No physical store, which reduces our costs and allows us to offer the best prices. We buy new products from previous seasons and samples directly from the brands. Quantities are always very limited: when it's gone, it's gone.












