---
product_id: 428197769
title: "K9 Sport Sack | Foam Booster Block Dog Backpack Carrier - Booster Block Only, Bag NOT Included (XS/Small)"
brand: "k9 sport sack"
price: "¥2092"
currency: JPY
in_stock: false
reviews_count: 5
category: "K9 Sport Sack"
url: https://www.desertcart.jp/products/428197769-k9-sport-sack-foam-booster-block-dog-backpack-carrier-booster
store_origin: JP
region: Japan
---

# fits XS/S K9 Sport Sack carriers 3-inch height boost removable washable cover K9 Sport Sack | Foam Booster Block Dog Backpack Carrier - Booster Block Only, Bag NOT Included (XS/Small)

**Brand:** k9 sport sack
**Price:** ¥2092
**Availability:** ❌ Out of Stock

## Summary

> 🐾 Boost your dog’s adventure game with every step!

## Quick Answers

- **What is this?** K9 Sport Sack | Foam Booster Block Dog Backpack Carrier - Booster Block Only, Bag NOT Included (XS/Small) by k9 sport sack
- **How much does it cost?** ¥2092 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/428197769-k9-sport-sack-foam-booster-block-dog-backpack-carrier-booster)

## Best For

- k9 sport sack enthusiasts

## Why This Product

- Trusted k9 sport sack brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Easy to Clean:** Includes a removable, washable cloth cover for hassle-free maintenance.
- • **Grow-With-You Design:** Perfect for puppies growing into their long-term carrier.
- • **Elevate Your Pup’s View:** Gives your dog a 3-inch lift for better comfort and visibility.
- • **Tailored Fit for Small Dogs:** Specifically designed for extra small and small K9 Sport Sack backpacks.
- • **Double the Boost, Double the Fun:** Stack two blocks for a total 6-inch lift when your pup needs extra height.

## Overview

The K9 Sport Sack Foam Booster Block (XS/Small) is a lightweight, foam insert designed to elevate your small dog by 3 inches inside compatible K9 Sport Sack backpacks. Ideal for growing puppies or dogs with wider bodies, it features a removable, washable cover and fits perfectly in XS/S sized carriers, enhancing comfort and visibility on every outing.

## Description

This product only includes the booster block. The K9 Sport Sack backpack is sold separately.The K9 Sport Sack booster block is designed to give your pup a 3 inch height boost. Our block is designed to fit snugly in K9 Sport Sack dog backpack carrier models. The booster block is made for dogs with a wide thicker body and short in length, growing dogs, or dogs who just need a boost! Each Booster Block size correlates with the sizes our K9 Sport Sack dog carrier bag.When purchasing a booster block, make sure you double check the size of your K9 Sport Sack pet backpack carrier. The sizes of the booster block corresponds to the size of the backpacks. Size XS/Small booster block for any XS/Small K9 Sport Sack Backpacks, Size Medium/Large booster block for any Medium or Large K9 Sport Sack BackpacksWhy own a K9 Sport Sack Dog Carrier?The K9 Sports Sack backpacks for dogs was created so we never had to leave our dog behind ever again! We want to be able to take our dogs wherever and whenever! K9 Sport Sack was created by dog owners, for dogs and owners - to explore, travel, have fun, and grow closer all while being safe, comfortable and easy.The K9 Sport Sack AIR is the original forward facing dog carrier backpack that doubles as a small to medium-sized dog airline friendly pet carrier. It’s super safe for your pup, comfortable for you, built to last, and will turn heads!We love what we do, and nothing makes us happier than seeing happy dogs and happy owners getting around in the K9 Sport Sack. -Team K9 Sport Sack

Review: 👯‍♀️ - Ich und mein Hunde liebt es nun ist auch eine schwierige Wanderung in der Sächsische Schweiz möglich
Review: Consider this product - There’s nothing to dislike. It’s about 3” thick lightweight sturdy foam. It’s easy to install-just pop it into the bottom and you’re ready to go. Yes it’s just foam but the convenience and the price is worth it because I Don’t want to purchase more than I need. It was made to exactly fit for your Sports Sack. I originally purchased my sports sack for my one dog until I rescued another one. She’s the type that has short bursts of energy and then she’s spent so taking her out on three mile walks was not something she could do. I found this foam and it is perfect for my new little low rider so that she can get that little boost and be able to see above my shoulders. I love that it doesn’t add any more weight but still firm enough that is comfortable for her to stand or sit on for the walk.

## Features

- GIVE YOUR DOG A BOOST - Put the Booster Block in the base of your carrier (sold separately) to help your dog sit 3” taller. Ideal for pet parents who want to purchase one, long-term carrier and let their puppy grow into it.
- WHEN TO USE - This booster block is also useful if your full-grown dog has a wide body but is short in length or is in between carrier sizes.
- WHAT’S INCLUDED - All carriers must be purchased separately. The booster block comes with a removable, washable cloth cover.
- COMPATIBILITY - The XS/S booster size is best for extra small, small & medium carriers. Consider the following dog carriers: Trainer, Air 2, Urban 3, Plus 2, Knavigate, Walk-On, and Karry-On.
- NEED MORE LIFT? - If your puppy is still “too short” for your long-term carrier choice, consider purchasing two blocks. This will provide a total of 6 inches of lift.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B075SHSBN6 |
| Additional Features | Airline Approved |
| Best Sellers Rank | #82,806 in Pet Supplies ( See Top 100 in Pet Supplies ) #262 in Dog Carrier Backpacks |
| Brand | K9 Sport Sack |
| Brand Name | K9 Sport Sack |
| Closure Type | Buckle |
| Color | Black |
| Colour | Black |
| Compatible with Vehicle Type | Car |
| Customer Reviews | 4.5 out of 5 stars 359 Reviews |
| Dog Breed Size | Small |
| Item Weight | 100 Grams |
| Item weight | 100 Grams |
| Manufacturer | K9 Sport Sack |
| Manufacturer Part Number | 689749869163_FBA |
| Material | foam |
| Material Type | foam |
| Maximum Weight Recommendation | 35 Pounds |
| Model Number | BB-S |
| Number of Items | 1 |
| Pet Type | Dog |
| Product Style | Casual |
| Recommended Uses For Product | Walking |
| Recommended uses for product | Walking |
| Size | XS/Small |
| Special features | Airline Approved |
| Target Audience | Dog, Small Animals |
| Target Species | Dog |
| UPC | 689749869163 |
| Unit Count | 1.00 Count |

## Product Details

- **Brand:** K9 Sport Sack
- **Colour:** Black
- **Item weight:** 0.08 Kilograms
- **Material:** foam
- **Special features:** Airline Approved

## Images

![K9 Sport Sack | Foam Booster Block Dog Backpack Carrier - Booster Block Only, Bag NOT Included (XS/Small) - Image 1](https://m.media-amazon.com/images/I/51cpzv9oWbL.jpg)
![K9 Sport Sack | Foam Booster Block Dog Backpack Carrier - Booster Block Only, Bag NOT Included (XS/Small) - Image 2](https://m.media-amazon.com/images/I/81WNeHdbdIL.jpg)
![K9 Sport Sack | Foam Booster Block Dog Backpack Carrier - Booster Block Only, Bag NOT Included (XS/Small) - Image 3](https://m.media-amazon.com/images/I/61BEbtUzmjL.jpg)
![K9 Sport Sack | Foam Booster Block Dog Backpack Carrier - Booster Block Only, Bag NOT Included (XS/Small) - Image 4](https://m.media-amazon.com/images/I/81ZCNUmkNEL.jpg)
![K9 Sport Sack | Foam Booster Block Dog Backpack Carrier - Booster Block Only, Bag NOT Included (XS/Small) - Image 5](https://m.media-amazon.com/images/I/91GKgTESSBL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 👯‍♀️
*by K***E on 2 January 2024*

Ich und mein Hunde liebt es nun ist auch eine schwierige Wanderung in der Sächsische Schweiz möglich

### ⭐⭐⭐⭐⭐ Consider this product
*by R***A on 4 July 2024*

There’s nothing to dislike. It’s about 3” thick lightweight sturdy foam. It’s easy to install-just pop it into the bottom and you’re ready to go. Yes it’s just foam but the convenience and the price is worth it because I Don’t want to purchase more than I need. It was made to exactly fit for your Sports Sack. I originally purchased my sports sack for my one dog until I rescued another one. She’s the type that has short bursts of energy and then she’s spent so taking her out on three mile walks was not something she could do. I found this foam and it is perfect for my new little low rider so that she can get that little boost and be able to see above my shoulders. I love that it doesn’t add any more weight but still firm enough that is comfortable for her to stand or sit on for the walk.

### ⭐⭐⭐⭐⭐ Puppy loves it!
*by I***A on 2 October 2024*

We love this backpack; excellent quality. Getting puppy in requires some practice but he enjoys it so much so now gets excited to get in. We get so many reactions and smiles from people around!!! And my 4 month old absolutely loves going for bicycle rides or just being in it overall; helps with taking him to places where normally dogs aren’t allowed, like grocery stores.

## Frequently Bought Together

- K9 Sport Sack | Pet Carrier Backpack Booster Block (Small) (Bag NOT Included)
- Earth Rated Dog Wipes, Hypoallergenic, Cleaning and Hydrating, for Grooming Paws, Body and Bums, Lavender Scented, 100 Count
- Earth Rated Dog Poo Bags, Guaranteed Leak Proof and Extra Thick Waste Bag Refill Rolls For Dogs, Lavender Scented, 120 Count

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**Shop now:** [https://www.desertcart.jp/products/428197769-k9-sport-sack-foam-booster-block-dog-backpack-carrier-booster](https://www.desertcart.jp/products/428197769-k9-sport-sack-foam-booster-block-dog-backpack-carrier-booster)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-11-02*