- Stock: In Stock 1-3 days
- Brand: JR GEAR
- CODE: TC-0010562
This offer ends in:
Description
Mummy Sleeping Bag - JR Gear Prism 133 PrimaLoft
JR Gear Prism 133 PrimaLoft - Ultra-Lightweight Sleeping Bag, 670g, with Differential PrimaLoft Insulation, YKK Zipper & Sleeping Pad Attachment System
The high-performance technical sleeping bag JR Gear Prism 133 PrimaLoft (#PSB133-TN) is a premium choice for mountaineers, hikers, and ultra-lightweight backpacking enthusiasts. Designed in an anatomical mummy shape (mummy shape), it perfectly hugs the body to minimize internal air pockets and provide excellent thermal insulation with the lowest possible weight. It is ideal for 2-3 season use, with a Comfort temperature rating of 11°C, Limit at 7°C, and Extreme safety temperature at -6°C.
The uniqueness of the JR Gear Prism 133 lies in its intelligent use of premium synthetic PrimaLoft® insulation, considered the "artificial down" of the global market. To achieve maximum thermal performance with a drastic reduction in weight, the company applied differential insulation density: 133g/m² on the upper section (where the body is exposed to cold) and 40g/m² on the lower section (where insulation mainly comes from the sleeping pad). This engineering allows the sleeping bag to weigh only 670 grams, while offering the unique PrimaLoft® ability to retain 98% of its insulating performance even when wet or exposed to heavy humidity.
The outer shell is constructed from durable, ultra-lightweight 20D Nylon Double Cire fabric, which repels surface moisture, while the closure system is based on premium Japanese YKK double-sided zippers with a large opening for effective ventilation. The hood features a drawcord closure for full head insulation and an extremely practical integrated pillow pocket. Finally, the special bottom attachment system for connecting to a sleeping pad stabilizes the sleeping bag on your mat, preventing slipping during the night.
Main Features & Advantages
- Premium PrimaLoft® Insulation:Top-tier synthetic insulation with an exceptional warmth-to-weight ratio and superior moisture resistance.
- Smart Weight Distribution (133g/m² Top - 40g/m² Bottom):Targeted warmth exactly where you need it, reducing total weight to only 670gr.
- Sleeping Pad Locking System:Special attachment system that integrates the sleeping mat into the lower part of the sleeping bag for stable sleep.
- Pillow Pocket in the Hood:Allows you to place clothing or an inflatable pillow so it stays securely under your head.
- Premium YKK Zippers:Dual-direction operation for easy use from inside and outside, while also allowing controlled foot ventilation.
Technical Specifications
| Brand / Manufacturer | JR Gear |
| Model / SKU | Prism 133 PrimaLoft / #PSB133-TN |
| Outer Material | 20D Nylon Double Cire (High-density, moisture-resistant) |
| Insulation Material | Synthetic PrimaLoft® (Water-resistant insulation performance) |
| Insulation Density | 133 g/m² on the upper section (Top) / 40 g/m² on the lower section (Bottom) |
| Total Weight | 670 gr (Ultra-Lightweight & Compact) |
| Temperature Rating (EN) | Comfort: +11°C | Limit: +7°C | Extreme: -6°C |
| Dimensions (Length x Shoulders x Feet) | 208 cm x 78 cm x 50 cm |
| Zipper Type / Brand | Double-sided YKK with large ventilation opening |
| Sleeping pad attachment system, hood pillow pocket, compression sack | |
| Recommended Use | Mountaineering, Hiking, Ultra-Light Travel, 2-3 Season Camping |
Tactical Corner Tip for the Prism 133 Sleeping Bag
The design philosophy of the JR Gear Prism 133 is based on the fact that the lower part of a sleeping bag gets compressed by body weight, meaning insulation must come from the sleeping pad. To fully utilize the capabilities of this sleeping bag and remain comfortable near 7°C, it is essential to use a sleeping pad with a good R-Value rating (R>2). Washing & Maintenance Tip:The major advantage of PrimaLoft® over natural down is that it is much easier to clean. You can wash it in a washing machine on a gentle delicate cycle (at 30°C) using a mild liquid detergent without fabric softener. It dries very quickly in open air (in a shaded area), but make sure to lay it flat horizontally rather than hanging it from the edges to prevent the synthetic insulation base from shifting.
Need help choosing the right sleeping bag according to your destination temperatures?Our team is at your disposal: +30 28210 87 733.
Specification Verification:The technical specifications (total weight 670g, PrimaLoft insulation 133g/m² Top and 40g/m² Bottom, 20D Nylon Double Cire fabric, YKK zippers, dimensions 208x78x50cm, temperature ratings Comfort 11°C / Limit 7°C / Extreme -6°C, pillow pocket, and sleeping pad attachment system) are based 100% on the official JR Gear specifications for the Prism 133 model.
