RAYMACE Bike Rear Rack Insulated Trunk Cooler Bag — 8L Water-Resistant Soft-Shell with Shoulder Strap

RAYMACE Bike Rear Rack Bag is an insulated, water-resistant 8‑liter trunk cooler bag that mounts to most racks for carrying drinks, snacks, and daily essentials while cycling.

This compact trunk cooler blends thermal insulation with a soft-shell design so you can keep beverages cool or food warm for hours without the bulk of a hard case. Built from water‑resistant fabric with thick aluminum film and 5mm EPE padding, the bag is sized for everyday rides—commutes, grocery runs, picnics, or e‑bike trips. It fastens quickly to most rear racks and converts into a convenient shoulder-carry using the included strap.

How well will this bag keep drinks and food at the right temperature?

The RAYMACE bag uses a thick aluminum inner film combined with 5mm EPE insulation to slow heat transfer, helping cold drinks stay cooler and warm items retain heat longer than an uninsulated pannier. Performance depends on outside temperature and whether the bag is pre-chilled or pre-warmed, but insulation provides a meaningful improvement for short to medium rides.

• Insulated inner lining with aluminum film for thermal reflectivity
• 5mm EPE foam layer to reduce heat conduction
• Dual-zipper main compartment for a tighter seal
• Holds several cans, a small lunch, or snacks without crushing

Will this fit my bike and how easy is installation?

The bag is designed for fast attachment to most rear racks on mountain bikes, cruisers, e-bikes and commuter bikes. Adjustable mounting straps secure the bag to standard rack tubing and can be tightened or released in seconds. When you’re off the bike, remove the shoulder strap and carry it like a cooler.

• Adjustable straps fit a wide range of rack widths and tube diameters
• Quick-release-style mounting for easy removal
• Lightweight soft-shell construction avoids added bulk
• Shoulder strap included for off-bike carrying

What size and storage features does the trunk cooler offer?

With external dimensions of about 12.5 x 6.3 x 6.3 inches, the bag provides approximately 8 liters of capacity—enough for a small picnic, several drinks, or daily essentials. The main compartment opens with a dual zipper, and there’s a small pocket on the flap for keys or cards plus a front water bottle holder for quick access.

• 12.5" x 6.3" x 6.3" footprint, about 8 L volume
• Main insulated compartment with dual zipper opening
• Small flap pocket for phone, wallet, or snacks
• External bottle holder for easy hydration on the go

How durable and weather-resistant is the material?

The outer fabric is water-resistant to protect contents from light rain and splashes, while the soft-shell body reduces weight and prevents denting that hard cases can suffer. For heavy or continuous downpours, consider additional rain protection, but the bag’s materials handle everyday cycling conditions well.

• Water-resistant outer fabric sheds light moisture
• Soft-shell design stays flexible and lightweight
• Stitched seams and reinforced straps for stable mounting
• Easy to wipe clean after outdoor use

Who is this for: The RAYMACE Bike Rear Rack Bag is ideal for cyclists who want a compact insulated bag for daily commuting, short touring, beach trips, or grocery runs—especially riders using e-bikes, cruisers, or mountain bikes who need an easy-to-install trunk cooler that doubles as a shoulder bag. If you want a lightweight, water-resistant pannier that preserves temperature for snacks and drinks without the weight and bulk of a hard case, this bag fits the need.