can you put regular weight plates in the bag to increase weight?

We recommend using the included weights that come with this product to assure that it works as desired.

If using on grass will it kill the grass?

No- the SpeedSac will not kill grass.

i live in AZ grass is scarce out here. will this die on pavement/parking lot ? lol

It’s good on grass, astroturf etc. I can’t vouch for pavement, concrete, gravel etc.

My 14 year old son said it easy just Velcro it around ur waist.

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SKLZ Speed Sac, Variable-Weight Resistance Sled Trainer, Strength Training Equipment, Adjustable Leash & Waist Belt, Black, 4.54-13.6kg

SKLZ Speed Sac, Variable-Weight Resistance Sled Trainer, Strength Training Equipment, Adjustable Leash & Waist Belt, Black, 4.54-13.6kg

Product ID: 117261893

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Details

Brand
SKLZ
Material
Other
Colour
Black /Yellow
Sport
Exercise and
Included components
Sled

🔄360° multi-directional belt design

⚖️4.54-13.6kg adjustable weight range

🛡️durable, high-quality construction

Description

⚡ Unleash explosive speed and unstoppable strength with every stride!

BUILT TO OUTLAST - Premium materials engineered for relentless, season-proof workouts
COMPLETE TRAINING KIT - Includes adjustable leash, waist belt, and three sand-fillable weight bags
VERSATILE ATHLETIC EDGE - Perfect for athletes aiming to dominate any sport with enhanced lower-body strength
360 DEGREE AGILITY BOOST - Train in all directions to elevate speed and explosive power
CUSTOMIZABLE RESISTANCE POWER - Adjust weights from 4.54 to 13.6kg for tailored strength gains

The SKLZ SpeedSac is a variable-weight resistance sled trainer designed to enhance lower-body strength, speed, and agility. Featuring adjustable weights from 4.54 to 13.6kg, a 360-degree multi-directional belt for versatile movement, and durable materials for long-lasting use, it’s the ultimate training tool for athletes seeking to elevate their performance across all sports.

Specifications

Color	Black /Yellow
Size	One Size
Style	Pull Up
Material type	Other
Number of pieces	1
Seasons	Evergreen
Features	Adjustable
Sport	Exercise and Fitness
Included components	Sled
Batteries included?	No
Brand	SKLZ
Department	Unisex
Manufacturer	SKLZ
Language	English
Item model number	3417
Product Dimensions	59.69 x 30.48 x 12.7 cm; 2.28 kg
ASIN	B07NTYBBDF

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