Viper BioThane Long Line Lead

A fixed-length long line made of BioThane coated webbing with a solid brass snap, sold in several lengths and widths.

Who it suits

Recall and distance training with dogs of most sizes, in wet grass, mud or snow, by owners who want a line that wipes clean.

Key facts

• Lengths 10, 15, 20 and 33 ft; widths 3/8, 1/2, 5/8 and 3/4 in; 25 colors (Dogline)
• BioThane: a flexible core bonded with a waterproof coating; Dogline says it stays flexible in cold and does not melt in heat (Dogline)
• Solid brass hardware; up to 750 lb breaking strength for the heaviest webbing; made in the USA (Dogline)
• Dogline says it is not chew proof and not to be used as a tie out (Dogline)

What reviewers say

K9 of Mine: In its 2021 long leash guide, the reviewer tried the Viper line with their own dog and was surprised how light it was and how smoothly it moved over grass and dirt; a subtle texture made it easy to stop by stepping on it, and the bright color was easy to keep track of. It notes BioThane can be heavier than light nylon lines and may tempt strong chewers.

We did not test it ourselves.

Pros

• Wipes clean and does not soak up water
• Slides over grass and dirt, per K9 of Mine
• Many lengths and widths

Cons

• Not chew proof (maker)
• Can be heavier than light nylon lines

Good to know

• Battersea recommends clipping a long line to the back of a harness, not a collar, so a dog that runs to the end of the line is less likely to be hurt (https://www.battersea.org.uk/pet-advice/dog-advice/how-use-long-line-lead).
• Dogline says not to use it as a tie out, and it is not chew proof (https://www.doglinegroup.com/products/biothane-15-ft-leash).