Backpack Ventilation Frame Max UL3 (New)

The Backpack Ventilation Frame Max Ultralight 3 is the easiest way to give your ultralight backpack that “ventilated back panel” feel. This design uses Vaucluse’s patented airflow frame concept to create a gap between you and the pack, helping dissipate heat and eliminate clammy, soaked backs after long, humid trail climbs. This Max UL3 version is our newest version, designed specifically for ultralight backpackers.

This ventilation frame features a sleeker design and attachment system specifically for ultralight backpacks or any backpack with attachment points on the sides (see photos). The four corners of the sleeve secure to any four points on your backpack and can be adjusted up or down to find the perfect location.

This version differs from our standard ventilation frame in that it lacks the overhead loops that wrap around the backpack's shoulder straps. As a result, this Max frame is 7 ounces lighter. Total weight is 4.8 ounces (137 grams).

The Max UL3 Ventilation Frame delivers a “moves-with-you” comfort that keeps you cooler, drier, and more comfortable, making it a cult favorite.

Free shipping on orders over $60 in the USA. Applies automatically at checkout.

Key Features

Sleeker design and simpler attachment points
Reduce sweat and increase airflow
Frame comes in one size (universal design)
Supports loads over 150 lbs
Fits packs 15L and larger
Cushioned mesh for added comfort
Ultralight (4.8 oz / 137 g)
Made in USA
Made from recyclable, non-toxic materials
Lifetime warranty and refund option

Specifications

Frame Weight: 3.0 oz (85 g)
Sleeve Weight: 1.8 oz (52 g)
Size: 14.5" tall x 8.5" wide x 1.25" deep (36.8 cm x 21.6 cm x 3.2 cm)
Ventilation Gap: 0.75" (1.9 cm)
Max Load Capacity: 150 pounds (68 kg)

Compatibility note

This frame and sleeve are designed for ultralight backpacks and are compatible with most 15L+ packs with side attachment points. See diagram in product photos.

Before you start

The frame arrives already installed inside the sleeve. It can be removed for washing the sleeve.

The sleeve has two different mesh faces: a cushioned side (for comfort against your back) and a thinner side (for maximum ventilation). Most people position the cushioned side against their back, but it can be used in either orientation.

Choose your ride height

Put the loaded backpack on and decide where you want the frame to sit.

Most hikers prefer the frame in the upper to upper-middle back area.

Attach the corners

Identify four attachment points on your backpack that the corner cords will reach. If the included cords aren’t long enough, use zip ties or tie loops to extend the cords.

Pinch each springless cord lock until the holes line up, and run each of the four cords through them.

The frame position can be fine-tuned up or down by adjusting the four corner cords.

Put the pack on, walk around, and make small re-adjustments as needed.

Using a different backpack?

If your pack’s attachment points don’t line up well with the sleeve cords, you can also secure the frame using zip ties, with or without the sleeve.

Will this ventilation frame fit my backpack?

Yes. Our frame comes in ONE SIZE and features a universal design that fits backpacks ranging from small to large. This allows you to attach the frame to your favorite pack.

You can find an image in the product photos showing how our one-size frame fits on backpacks of varying sizes: small, medium, and large. 

Customers have attached the frame to the following ultralight brands: Aarn Packs, Atom Packs, Black Diamond, Bonfus, Durston Gear, Evolved Supply Co., Gossamer Gear, Hyperlite Mountain Gear, LiteAF, Lite Werks, Nashville Pack, Outdoor Vitals, Pa'lante Packs, PBD Ultralight, Seek Outside, Six Moon Designs, Superior Wilderness Designs (SWD), ULA Equipment, Virginia Foothill Designs, Waymark, Zpacks

Customer Use Cases

Customers use the frame for activities such as hiking, commuting, school, camping, biking, rucking, lawn blowing, carrying O2 tank packs, hunting, and traveling.

The included Mesh Sleeve offers two thickness options: a thin layer for ventilation and a cushioned side for comfort, making it ideal for larger packs and high-load situations.

Compatible with packs ranging from 15L to over 65L, the frame provides ventilation for various activities.

Backpack Sizes that fit the Frame

Small packs (15L to 20L)
Day/Travel packs (20L to 28L)
Larger packs (30L to 45L)
Excursion packs (45L+) 

Benefits

Helps you sweat less and enjoy backpacking more.
Improves airflow with natural ventilation, keeping you cooler and drier.
Attaches to any backpack (framed or frameless), one size fits all.
Sturdy, abrasion-resistant material is flexible and conforms to your back.
Lightweight design (5.5 oz). As light as a pair of socks.
TSA compliant for travel.

Included items

Backpack Ventilation Frame
Mesh Sleeve with 4 cord locks
Loops to connect the frame to your backpack straps
6 reusable zip ties to secure the frame on your backpack
Satisfaction guaranteed
Lifetime warranty
30-day return window

Material

Frame: Recyclable, durable, abrasion-resistant High-Density Polyethylene (HDPE). Safe for use, made from FDA-approved materials.
Mesh Sleeve Front: 1/8 inches (3mm) spacer mesh.
Mesh Sleeve Back: Pocket mesh
Side Loops: 550 Paracord Buckles: 0.5 in lightweight buckle
Springless cord locks